388     ShenandoahHeapLocker lock(_heap->lock());

   388     ShenandoahHeapLocker lock(_heap->lock());

   389     prepare();

   389     prepare();

   390   }

   390   }

   391 

   391 

   392   _heap->set_concurrent_traversal_in_progress(true);

   392   _heap->set_concurrent_traversal_in_progress(true);

   393 

   394 

   394   bool process_refs = _heap->process_references();

   395   bool process_refs = _heap->process_references();

   395   if (process_refs) {

   396   if (process_refs) {

   396     ReferenceProcessor* rp = _heap->ref_processor();

   397     ReferenceProcessor* rp = _heap->ref_processor();

   397     rp->enable_discovery(true /*verify_no_refs*/);

   398     rp->enable_discovery(true /*verify_no_refs*/);

   599     assert(_task_queues->is_empty(), "queues must be empty after traversal GC");

   600     assert(_task_queues->is_empty(), "queues must be empty after traversal GC");

   600     TASKQUEUE_STATS_ONLY(_task_queues->print_taskqueue_stats());

   601     TASKQUEUE_STATS_ONLY(_task_queues->print_taskqueue_stats());

   601     TASKQUEUE_STATS_ONLY(_task_queues->reset_taskqueue_stats());

   602     TASKQUEUE_STATS_ONLY(_task_queues->reset_taskqueue_stats());

   602 

   603 

   603     // No more marking expected

   604     // No more marking expected

   604     _heap->mark_complete_marking_context();

   606     _heap->mark_complete_marking_context();

   605 

   607 

   606     fixup_roots();

   608     fixup_roots();

   607     _heap->parallel_cleaning(false);

   609     _heap->parallel_cleaning(false);

   608 

   612 

   609     // Resize metaspace

   613     // Resize metaspace

   610     MetaspaceGC::compute_new_size();

   614     MetaspaceGC::compute_new_size();

   611 

   615 

   612     // Still good? We can now trash the cset, and make final verification

   616     // Still good? We can now trash the cset, and make final verification

   649       _heap->free_set()->rebuild();

   653       _heap->free_set()->rebuild();

   650       reset();

   654       reset();

   651     }

   655     }

   652 

   656 

   653     assert(_task_queues->is_empty(), "queues must be empty after traversal GC");

   657     assert(_task_queues->is_empty(), "queues must be empty after traversal GC");

   655     assert(!_heap->cancelled_gc(), "must not be cancelled when getting out here");

   658     assert(!_heap->cancelled_gc(), "must not be cancelled when getting out here");

   656 

   659 

   657     if (ShenandoahVerify) {

   660     if (ShenandoahVerify) {

   658       _heap->verifier()->verify_after_traversal();

   661       _heap->verifier()->verify_after_traversal();

   659     }

   662     }